Foldable mattress core structure and mattress set

Abstract

We provide a foldable mattress core structure and mattress set. [Solution] The foldable mattress core structure includes a mattress core body 1, which is provided with folding sections. These folding sections are connected to opposing sides of the mattress core body, and the number of folding sections is one or more. When there are two or more folding sections, they are spaced apart in the length or width direction of the mattress core body. The relationship between the number of layers n after folding the mattress core body and the number of folding sections a satisfies a = n-1. The mattress core body can be folded along grooves 2, making the folding process simple and orderly. By concentrating and limiting the stress during folding in the grooves, it prevents pressure and damage to other parts of the mattress core body. After unfolding the mattress core body, no wrinkles form on the surface, improving flatness and comfort during use. This prevents gaps and sinking problems caused by the segmented structure, ensuring uniform support and excellent comfort. This solves the problems of high manufacturing costs and noticeable gaps in the mattress core body.

Description

Technical Field

[0001] The present invention relates to the technical field of mattresses, and particularly to a foldable mattress core structure and a mattress set.

Background Art

[0002] Air fiber mattresses are a new type of mattress material that has emerged in recent years. The core technology is to form a three-dimensional network structure using a polymer (such as one or more of polyolefin thermoplastic elastomer (POE), ethylene-based polymer (such as polyethylene PE), thermoplastic polyester elastomer (TPEE)) by a special technology to achieve the "air knitting" effect.

[0003] Prior art air fiber mattresses include an air fiber layer mattress body and a cover body. There are some foldable mattresses in the prior art, mainly including the following several structures: The first is to directly put the entire mattress body into the cover and fold it in an S shape. This folded mattress is easy to unfold when used after folding, but it is difficult to flatten. The folding points are sunken, wrinkled due to extrusion, and cannot completely recover flatness, which greatly reduces the comfort of the product. Moreover, permanent damage to the fracture toughness due to the depression is likely to occur, affecting the service life and comfort of the product.

[0004] Another foldable mattress is placed entirely in a sleeve in more than three independent forms. Compared with the S-shaped folding, the occurrence of creases is reduced. However, since more than three pieces are separately arranged in the case, gaps are formed between them, and the extrusion part may be deformed and sunken during folding. Gaps may occur when the product is used, and it may not be able to be flatly connected due to the depression, which can greatly reduce the comfort and service life of the product.

[0005] The third type of foldable mattress includes multiple covers connected via seams, with an independent mattress body placed inside each cover. When the mattress body needs to be folded, it folds along the sections between the covers. While such specially connected covers are in the traditional sense of tri-fold, quad-fold, and multi-fold mattresses, these covers have drawbacks such as a complex production process, low production efficiency, and excessively high costs, as well as noticeable gaps when unfolded and in use. [Overview of the project] [Means for solving the problem]

[0006] The purpose of this invention is to provide a foldable mattress core structure and mattress set in order to solve the technical problems of the prior art, which involve high manufacturing costs for the foldable mattress core body and the presence of noticeable gaps. The details of the many technical effects that can be produced by preferred technical solutions among the many technical solutions provided by this invention are described below.

[0007] To achieve the above objective, this invention provides the following technical solutions: It has a foldable mattress core structure, Including the mattress core, The mattress core body is provided with a folding section, and the folding section is connected to opposite sides of the mattress core body. The number of folding sections is one or more. When the number of folding sections is two or more, the folding sections are spaced apart in the length or width direction of the mattress core body. The relationship between the number of layers n after folding the mattress core body and the number of folding sections a satisfies a = n-1.

[0008] Preferably, the foldable portion includes grooves that communicate with opposing sides of the mattress core body, Alternatively, the material density of the foldable portion is less than the material density of the rest of the mattress core body.

[0009] Preferably, the opposing ends of the grooves penetrate the opposing sides of the mattress core body, The groove has a closed side and a notch, where, The closing side is provided opposite the notch, the notch communicates with the upper or lower surface of the mattress core body, and the mattress core body can be folded in a direction away from the notch.

[0010] Preferably, the orientation of the notches in two adjacent grooves is the same or opposite in different grooves, where the mattress core body can be folded in at least two different directions when the orientation of the notches in different grooves is opposite.

[0011] Preferably, of the three adjacent grooves, the grooves include a central groove and a side groove, where, The three grooves are spaced apart in the longitudinal direction of the mattress core body, the side grooves are located on both sides of the central groove, and the orientation of the notches in the side grooves is opposite to the orientation of the notches in the central groove.

[0012] Preferably, the number of grooves is at least four, which are the first groove, the second groove, the third groove, and the fourth groove, where, The first groove, the second groove, the third groove, and the fourth groove are arranged at intervals along the longitudinal direction of the mattress core body, thereby sequentially dividing the mattress core body into a first part, a second part, a third part, a fourth part, and a fifth part. The orientation of the grooves of the first groove, the second groove, the third groove, and the fourth groove is the same. The mattress core body is folded along the corresponding grooves, after which the first, second, fourth, and fifth parts are stacked in order to form four folding structures, and the third part is located at the end of the four folding structures.

[0013] Preferably, the mattress core body includes a soft area and a hard area, where, The soft area and the hard area are arranged with a gap between them in the longitudinal and / or thickness direction of the mattress core body. When the soft area and the hard area are arranged with an interval between them in the longitudinal direction of the mattress core body, the foldable portion is provided at the boundary position between the hard area and the soft area.

[0014] Preferably, the mattress core body includes an upper mattress body and a lower mattress body provided along its thickness direction, where, The upper mattress body includes a soft area and a hard area, wherein the hard area is located between two of the soft areas, or the soft area is located between two of the hard areas. The groove is provided at the boundary between the soft area and the hard area. The lower mattress body includes a soft area and a hard area, and in the lower mattress body, the orientation of the soft area and the hard area is the same as or opposite to the arrangement of the soft area and the hard area in the upper mattress body. The closed side of the groove is located on the lower mattress body and the notch of the groove communicates with the surface of the upper mattress body, or the closed side of the groove is located on the upper mattress body and the notch of the groove communicates with the surface of the lower mattress body.

[0015] Preferably, the width of the grooves is 5 to 40 mm, and the widths of the grooves are equal or unequal. The depth of the groove is 1 / 4 to 2 / 3 of the thickness of the mattress core body, the depth of the groove is 5 to 100 mm, and the depths of the groove are equal or unequal. The grooves are groove body structures formed by setting, hot-pressure forming, or cutting within a molten spray mold.

[0016] Preferably, a pad set, A cover body, comprising the foldable mattress core structure according to any one of claims 1 to 9, wherein the mattress core body is located in the cover body.

Advantages of the Invention

[0017] The foldable mattress core structure and the mattress set provided by the present invention have the following beneficial effects as compared with the prior art: The mattress core body is foldable along the foldable part when folded, providing a clear folding guide for the mattress core body, making the folding process easy and orderly. At the same time, the folding stress is concentrated and constrained in the groove, avoiding the extrusion and destruction of the mattress core body, effectively preventing the occurrence of permanent wrinkles and structural depressions, and significantly extending the service life of the mattress core body. After the mattress core body is unfolded, it presents a state without creases on the surface, increasing the flatness and comfort during use, preventing the gap feeling and depression problems caused by the separation structure, and ensuring uniform support and excellent use comfort.

Brief Description of the Drawings

[0018] In order to more clearly explain the embodiments of the present invention or the technical aspects in the prior art, the drawings necessary for use in the following description of the embodiments or the prior art will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without creative labor. [Figure 1] It is a schematic structural diagram of Example 1 of the foldable mattress core structure. [Figure 2] It is a schematic structural diagram of Example 2 of the foldable mattress core structure. [Figure 3] It is a schematic structural diagram of the mattress core body of Example 3 of the foldable mattress core structure in the unfolded state. [Figure 4] It is a schematic structural diagram of the mattress core body of Example 3 of the foldable mattress core structure in the folded state. [Figure 5]It is a schematic structural diagram of Example 4 of a foldable mattress core structure. [Figure 6] It is a schematic structural diagram of Example 5 of a foldable mattress core structure.

Embodiments for Carrying out the Invention

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be described in detail below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative labor belong to the scope protected by the present invention.

[0020] In the description of the present invention, the orientation or positional relationship indicated by terms such as "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "upper", "bottom", "inner", "outer", "side", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must be constructed and operated in a specific orientation and a specific orientation, and is not a limitation of the present invention. In the description of the present invention, unless otherwise specified, the meaning of "plural" is two or more.

[0021] The embodiments of the present invention provide a foldable mattress core structure and a mattress set that, after being unfolded, present a state without creases on the surface, increase the flatness and comfort during use, prevent the sense of gap and depression problems caused by the separation structure, and ensure uniform support and excellent use comfort.

[0022] Hereinafter, with reference to FIGS. 1 to 5, the technical solution provided by the present invention will be described in more detail.

[0023] (Example 1) The foldable mattress core structure provided in this invention includes a mattress core body 1, wherein the mattress core body is provided with folding sections, the folding sections are connected to opposing sides of the mattress core body, the number of folding sections is one or more, and if there are two or more folding sections, the folding sections are spaced apart in the longitudinal or widthwise direction of the mattress core body, and the relationship between the number of layers n after folding the mattress core body and the number of folding sections a satisfies a = n-1.

[0024] As shown in Figures 1 to 5, the mattress core body 1 of this embodiment is provided with grooves 2 that connect both sides of the mattress core body 1. The number of grooves 2 is one or two or more, and when there are two or more grooves 2, the grooves 2 are spaced apart in the longitudinal or widthwise direction of the mattress body 1. The relationship between the number of layers n into which the mattress core body 1 is folded and the number a of grooves 2 satisfies a = n-1.

[0025] Specifically, the mattress core body 1 is not made of multiple separate small pieces joined together, but is a single, integrated structure manufactured from the entire air fiber material. This integrated structure ensures that the mattress core body 1 has a continuous and complete support surface when unfolded, thus avoiding problems such as uneven support and reduced comfort caused by the presence of slits.

[0026] Air fiber materials, also known as three-dimensional stereoelastic materials in this art, are typically three-dimensional mesh porous structures formed by melt-spinning thermoplastic polymers (e.g., TPEE, PE, POE, POE+PE, SEBS, POE+SEBS, etc.) to irregularly entangle and intertwine fiber threads in space and weld them at contact points. Because the interior of this material has an extremely high porosity (usually over 90%), it possesses excellent breathability and moisture-wicking properties. At the same time, its three-dimensional crimped fiber structure provides the material with excellent elasticity and support capabilities, enabling point-like support to conform to the curves of the human body. Due to this integrally molded three-dimensional structure, the mattress core body 1, having a certain thickness, exhibits strong bending rigidity overall, making conventional folding difficult.

[0027] As an optional embodiment, referring to Figure 1, the opposing ends of the groove 2 penetrate both opposing sides of the mattress core body 1, the groove 2 has a closing side 21 and a notch 22, where the closing side 21 is provided opposite the notch 22, the notch 22 communicates with the upper or lower surface of the mattress core body 1, and the mattress core body 1 can be folded in a direction away from the notch 22.

[0028] The groove 2 has a notch 22 facing the surface of the mattress core body 1 and a closing side 21 located inside the mattress core body 1. Here, the "non-penetrating" characteristic is ensured by this closing side 21. Due to the presence of the closing side 21, the material of the mattress core body 1 in the groove 2 is not completely cut, and its bottom maintains the connection of the material, thereby maintaining the structural integrity of the entire mattress core body 1.

[0029] The advantages of the above structure are, firstly, that by removing a portion of the material to form groove 2, the cross-sectional thickness and bending rigidity of the pre-set folding line area can be significantly reduced, creating a "locally weakened" area that is easy to bend; and secondly, by holding the closed side 21, it is possible to ensure that the mattress core remains a complete whole after unfolding, that the surface is flat, and that the gap problem inherent in the separation structure does not occur.

[0030] The grooves 2 can be formed in various ways. As an alternative embodiment, they can be formed on the molded air fiber mattress core body 1 by a post-processing process. For example, a numerically controlled cutting device can be used to precisely cut according to a preset path and depth to form grooves 2 with a regular cross-sectional shape. As another alternative embodiment, they can be integrally molded during the manufacture of the air fiber material. Specifically, a protruding structure corresponding to the shape of the grooves 2 is pre-designed and processed inside the melt-blown mold for manufacturing air fibers. When molten polymer fiber filaments are injected into the mold and cooled and hardened, the mattress core body 1 with the preset grooves 2 is directly formed, thereby eliminating the post-processing step, improving productivity, and reducing costs. The grooves 2 can also be formed by hot-pressing, where an indenter with the cross-sectional shape of the grooves 2 heated to a specific temperature is used to heat-press the surface of the mattress core body 1, melting and compacting the fibers in that area to form a recessed groove 2 structure.

[0031] In an optional embodiment, the orientation of the notches 22 in two adjacent grooves 2 is either the same or opposite, and in this case, the mattress core body 1 can be folded in at least two different directions when the orientation of the notches in the different grooves 2 is opposite.

[0032] (Example 2) As shown in Figure 2, the mattress core body 1 of this embodiment is provided with three grooves 2, and of the three adjacent grooves 2, each groove 2 includes a central groove 23 and a side groove 24, where, The three grooves 2 are spaced apart in the longitudinal direction of the mattress core body 1, and the side grooves 24 are located on both sides of the central groove 23, with the orientation of the notches 22 in the side grooves 24 being opposite to the orientation of the notches 22 in c23.

[0033] As shown in Figure 2, the mattress core body 1 folds away from the notch 22 when folded, and the mattress core body 1 can be folded to its original quarter size along the three grooves 2. When it is needed for use, the folded mattress core body 1 can be unfolded by operating it in the reverse direction. The folding stress is effectively constrained by the grooves 2, and the remaining part of the mattress core body 1 is undamaged, so after unfolding, it can maintain the excellent support performance and comfortable experience of the air fiber core.

[0034] (Example 3) Similar to Example 1, the mattress core structure of this embodiment includes an integrated mattress core body 1 made of air fiber material. Assuming that this mattress core body 1 needs to be folded into five parts to obtain a smaller storage dimension, four parallel grooves 2 need to be provided in the mattress core body 1.

[0035] Unlike Example 1, all four grooves 2 in this embodiment are provided on the same surface of the main body, for example, on its underside. These four grooves 2 are the first groove 25, the second groove 26, the third groove 27, and the fourth groove 28. Referring to Figure 3, the first groove 25, the second groove 26, the third groove 27, and the fourth groove 28 sequentially partition the first part 11, the second part 12, the third part 13, the fourth part 14, and the fifth part 15. The orientation of the grooves 22 of the first groove 25, the second groove 26, the third groove 27, and the fourth groove 28 is the same. As shown in Figure 4, after the mattress core body 1 of this embodiment is folded along the corresponding grooves 2, the first part 11, the second part 12, the fourth part 14, and the fifth part 15 are stacked in order to form four folded structures, with the third part 13 located at the end of the four folded structures.

[0036] A beneficial effect of this embodiment is that, when the core body 1 is unfolded and in use, all four grooves 2 are located on the underside of the mattress core body, so its upper surface, i.e., the surface that comes into direct contact with the human body, is perfectly flat and smooth, without any dents or structural changes. This provides the user with better comfort and uniform support. At the same time, this stackable folding method also achieves the goals of convenient storage and non-destructive folding, protects the structure of the air fiber material, and extends its service life.

[0037] (Example 4) As an optional embodiment, as shown in Figure 5, the mattress core body 1 includes a soft area 30 and a hard area 40, where, The soft area 30 and the hard area 40 are spaced apart in the longitudinal and / or thickness direction of the mattress core body 1. When the soft area 30 and the hard area 40 are arranged with a gap between them in the longitudinal direction of the mattress core body 1, the groove 2 is provided at the boundary position between the hard area 40 and the soft area 30.

[0038] Mattresses often employ compartmentalized designs to meet the support needs of different parts of the human body. The mattress core body 1 in this embodiment employs such a composite structure. Specifically, during the manufacturing process of the air fiber material, the fiber density in different areas is controlled, or raw materials of different hardness are used, so that the integrally molded mattress core body 1 forms functional compartments with different physical properties along its longitudinal direction.

[0039] As shown in Figure 4, the core body 1 of this mattress can be designed as a three-tiered structure of "soft-hard-soft". The middle section is the hard area 40, which has a high fiber density and provides stronger support to conform to the lower back and buttocks of the human body during use, preventing excessive indentation of the spine. The sections located at both ends are the soft zones 30, which have a lower fiber density and the fabric is more flexible, conforming to the shoulders and feet of the human body, fitting the body's curves better, relieving pressure, and enhancing comfort.

[0040] One feature of this embodiment is that the position of the groove 2 is connected to the boundary of these functional areas. As shown in Figure 6, the groove 2 is provided at the boundary between the soft area 30 and the hard area 40.

[0041] As an optional embodiment, as shown in Figure 5, the mattress core body 1 includes an upper mattress body 16 and a lower mattress body 17 provided along its thickness direction, where the upper mattress body 16 includes a soft area 30 and a hard area 40, the hard area 40 is located between the two soft areas 30, or the soft area 30 is located between the two hard areas 40, and the groove 2 is provided at the boundary position between the soft area 30 and the hard area 40. The lower mattress body 17 includes a soft area 30 and a hard area 40, and the orientation of the soft area 30 and the hard area 40 in the lower mattress body 17 is the same as or opposite to the orientation of the soft area 30 and the hard area 40 in the upper mattress body 16. The closed side 21 of groove 2 is located on the lower mattress body 17 and the notch 22 of groove 2 is in communication with the surface of the upper mattress body 16, or the closed side 21 of groove 2 is located on the upper mattress body 16 and the notch 22 of groove 2 is in communication with the surface of the lower mattress body 17.

[0042] The beneficial effects of the above-described structure are as follows: 1. The folding partition and the functional partition are perfectly aligned, and the three parts after folding are exactly two soft areas 30 and one hard area 40, with a clear structural division that matches the product's usage needs. Secondly, from a mechanical standpoint, the boundary between the soft area 30 and the hard area 40 is itself a natural boundary where the physical properties of the material change. By placing groove 2, which is a localized weakening structure, here, the folding process can be made smoother and more natural, stress transitions become gentler, and the risk of damaging the material structure can be further reduced. In addition, this design achieves a fusion of function and convenience, allowing users to enjoy the ergonomic advantages of partition support while simultaneously being able to easily fold and store this functional mattress, solving the problem that the core of conventional functional composite mattresses is usually relatively heavy and difficult to handle.

[0043] As an optional embodiment, the width of groove 2 is 5 to 40 mm, the widths of groove 2 are equal or unequal, the depth of groove 2 is 1 / 4 to 2 / 3 of the thickness of the mattress core body, and the width of the groove can be adjusted according to different parts, that is, grooves of different widths can be installed on the same material.

[0044] The depth of groove 2 is 5-100 mm, and the depths of groove 2 are either equal or unequal. Depending on the thickness of the material itself, grooves of different depths are installed to facilitate bending.

[0045] (Example 5) As shown in Figure 6, this embodiment differs in that the foldable portion of this embodiment is a low-density area 50, and the material density of the low-density area 50 is lower than the material density of the rest of the mattress core body 1.

[0046] Since the material density of the low-density area 50 is lower than the material density of the rest of the mattress core body, stress tends to concentrate in the low-density area 50 when the mattress core body 1 needs to be folded, making it convenient to fold the mattress core body 1.

[0047] (Example 6) This embodiment provides a pad set, which includes a cover body and the above-described foldable mattress core structure, wherein the mattress core body 1 is located within the cover body.

[0048] The cover of this embodiment has an integrated structure and has only one storage compartment, in which the mattress core body 1 can be placed, and there are no visible gaps on the surface of the mattress assembly after it has been unfolded. In this specification, specific features, structures, or characteristics can be incorporated in an appropriate manner in any one or more embodiments or examples.

[0049] In this specification, reference terms such as “one embodiment,” “several embodiments,” “example,” “specific example,” or “several examples” mean that the specific features, structures, materials, or characteristics described in relation to that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the general expressions of the above terms do not necessarily apply to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. Furthermore, where inconsistent, a person skilled in the art may combine different embodiments or examples and features of different embodiments or examples described herein.

[0050] The above describes only specific embodiments of the present invention. However, the scope of protection of the present invention is not limited thereto. A person skilled in the art can easily conceive of modifications and substitutions within the scope of the technology disclosed in this utility model, and such modifications should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention must conform to the scope of protection of the claims described above. [Explanation of symbols]

[0051] 1. Mattress core body; 11. First part; 12. Second part; 13. Third part; 14. Fourth part; 15. Fifth part; 16. Upper mattress body; 17. Lower mattress body; 2. Groove; 21. Closing side; 22. Notch; 23. Central groove; 24. Side grooves; 25. First groove; 26. Second groove; 27. Third groove; 28. Fourth groove; 30. Soft area; 40. Hard area; 50. Low-density area.

Claims

1. It has a foldable mattress core structure, Including the mattress core, The mattress core body is provided with a folding section, and the folding section is connected to opposite sides of the mattress core body. The number of folding sections is one or more, and if the number of folding sections is two or more, the folding sections are arranged at intervals in the longitudinal or widthwise direction of the mattress core body, and the relationship between the number of layers n after folding the mattress core body and the number of folding sections a satisfies a = n - 1, characterized in that the foldable mattress core structure is characterized in that

2. The foldable portion includes grooves that communicate with opposing sides of the mattress core body, Alternatively, the foldable mattress core structure according to claim 1, characterized in that the material density of the foldable portion is less than the material density of the rest of the mattress core body.

3. The opposing ends of the grooves penetrate both opposing sides of the mattress core body, The groove has a closed side and a notch, where, The foldable mattress core structure according to claim 1, characterized in that the closing side is provided opposite the notch, the notch communicates with the upper or lower surface of the mattress core body, and the mattress core body can be folded in a direction away from the notch.

4. The foldable mattress core structure according to claim 3, characterized in that, of the two adjacent grooves, the orientation of the notches in different grooves is the same or opposite, and the mattress core body can be folded in at least two different directions when the orientation of the notches in different grooves is opposite.

5. Of the three adjacent grooves, the groove includes a central groove and a side groove, where, The foldable mattress core structure according to claim 3, characterized in that the three grooves are spaced apart in the longitudinal direction of the mattress core body, the side grooves are located on both sides of the central groove, and the orientation of the notches in the side grooves is opposite to the orientation of the notches in the central groove.

6. The number of grooves is at least four, and these are the first groove, the second groove, the third groove, and the fourth groove, where, The first groove, the second groove, the third groove, and the fourth groove are arranged at intervals along the longitudinal direction of the mattress core body, thereby sequentially dividing the mattress core body into a first part, a second part, a third part, a fourth part, and a fifth part. The grooves of the first groove, the second groove, the third groove, and the fourth groove are all oriented in the same direction. The foldable mattress core structure according to claim 3, characterized in that the mattress core body is folded along corresponding grooves, and then the first part, the second part, the fourth part, and the fifth part are stacked in order to form four folding structures, and the third part is located at the end of the four folding structures.

7. The aforementioned mattress core body includes a soft area and a hard area, where, The soft area and the hard area are arranged with a gap between them in the longitudinal and / or thickness direction of the mattress core body. The foldable mattress core structure according to claim 1, characterized in that when the soft area and the hard area are arranged at an interval in the longitudinal direction of the mattress core body, the foldable portion is provided at the boundary position between the hard area and the soft area.

8. The aforementioned mattress core body includes an upper mattress body and a lower mattress body provided along its thickness direction, where, The upper mattress body includes a soft area and a hard area, wherein the hard area is located between two of the soft areas, or the soft area is located between two of the hard areas. The groove is provided at the boundary between the soft area and the hard area. The lower mattress body includes a soft area and a hard area, and in the lower mattress body, the orientation of the soft area and the hard area is the same as or opposite to the arrangement of the soft area and the hard area in the upper mattress body. The foldable mattress core structure according to claim 2, characterized in that the closed side of the groove is located on the lower mattress body and the notch of the groove communicates with the surface of the upper mattress body, or the closed side of the groove is located on the upper mattress body and the notch of the groove communicates with the surface of the lower mattress body.

9. The width of the grooves is 5 to 40 mm, and the widths of the grooves are either equal or unequal. The depth of the groove is 1 / 4 to 2 / 3 of the thickness of the mattress core body, the depth of the groove is 5 to 100 mm, and the depths of the groove are equal or unequal. The foldable mattress core structure according to claim 2, characterized in that the grooves are groove body structures formed by setting and forming in a molten spray mold, or by hot-pressure formation, or by cutting.

10. It is a pad set, A pad set comprising a cover body and a foldable mattress core structure according to any one of claims 1 to 9, wherein the mattress core body is located within the cover body.

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